Check_MK Werk 4396: Fixed exception in BI views when using site icons

ID: 4396 Title: Fixed exception in BI views when using site icons Component: BI Level: 1 Class: Bug fix Version: 1.5.0i1 There is a annicient and now hidden feature "site icons". The user can set the option use_siteicons = True in the multisite.mk and put an icon named like this into the images/icons directory: icons/site-%s-24.png. When this is enabled and the sites icon painter is added to a BI view, this leads to an exception. That the "site" key is not available.